Climatological Report (Monthly)
Issued by NWS Sterling, VA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
000
CXUS51 KLWX 071513
CLMDCA

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1013 AM EST WED JAN 7 2015

...................................

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              79   12/07/1998
 LOW              -13   12/31/1880
HIGHEST            70   12/01        66       4
LOWEST             29   12/31        17      12
AVG. MAXIMUM     49.8              46.8     3.0     49.8
AVG. MINIMUM     37.6              32.5     5.1     34.7
MEAN             43.7              39.7     4.0
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      0               1.8    -1.8
DAYS MIN <= 32      4              14.5   -10.5
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.56   1901
 MINIMUM         0.19   1889
TOTALS           3.50              3.05    0.45     5.53
DAILY AVG.       0.11              0.10    0.01
DAYS >= .01        13               9.7     3.3
DAYS >= .10         8               5.6     2.4
DAYS >= .50         2               2.4    -0.4
DAYS >= 1.00        0               0.5    -0.5
GREATEST
 24 HR. TOTAL    0.91   12/23 TO 12/24

SNOWFALL (INCHES)
RECORDS
 TOTAL           16.6   2009
TOTALS              T               2.3    -2.3
SINCE 7/1           T               2.8    -2.8
SNOWDEPTH AVG.      0
DAYS >= TRACE       2               1.5     0.5
DAYS >= 1.0         0               0.7    -0.7
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL        T

DEGREE_DAYS
HEATING TOTAL     649               786    -137      696
 SINCE 7/1       1256              1481    -225     1404
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1712              1549     163     1719
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    28/320    DATE  12/10
HIGHEST GUST SPEED/DIRECTION    43/330    DATE  12/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      2
HAZE                      8

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

WASHINGTON DC...REAGAN NATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS WELL ABOVE NORMAL. THE MONTHLY
PRECIPITATION WAS SLIGHTLY ABOVE NORMAL.

AFTER A COLDER THAN NORMAL NOVEMBER...LAST MONTH TIED WITH 1979 AS
THE 15TH WARMEST DECEMBER ON RECORD.

ONLY A TRACE OF SNOWFALL WAS OBSERVED THE ENTIRE MONTH...THE LOWEST
DECEMBER MONTHLY SNOWFALL TOTAL SINCE 2011.

$$






USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.